Displaying 1 - 11 of 11
Campisi, E., & Ozyurek, A. (2013). Iconicity as a communicative strategy: Recipient design in multimodal demonstrations for adults and children. Journal of Pragmatics, 47, 14-27. doi:10.1016/j.pragma.2012.12.007.
AbstractHumans are the only species that uses communication to teach new knowledge to novices, usually to children (Tomasello, 1999 and Csibra and Gergely, 2006). This context of communication can employ “demonstrations” and it takes place with or without the help of objects (Clark, 1996). Previous research has focused on understanding the nature of demonstrations for very young children and with objects involved. However, little is known about the strategies used in demonstrating an action to an older child in comparison to another adult and without the use of objects, i.e., with gestures only. We tested if during demonstration of an action speakers use different degrees of iconicity in gestures for a child compared to an adult. 18 Italian subjects described to a camera how to make coffee imagining the listener as a 12-year-old child, a novice or an expert adult. While speech was found more informative both for the novice adult and for the child compared to the expert adult, the rate of iconic gestures increased and they were more informative and bigger only for the child compared to both of the adult conditions. Iconicity in gestures can be a powerful communicative strategy in teaching new knowledge to children in demonstrations and this is in line with claims that it can be used as a scaffolding device in grounding knowledge in experience (Perniss et al., 2010).
Debreslioska, S., Ozyurek, A., Gullberg, M., & Perniss, P. M. (2013). Gestural viewpoint signals referent accessibility. Discourse Processes, 50(7), 431-456. doi:10.1080/0163853x.2013.824286.
AbstractThe tracking of entities in discourse is known to be a bimodal phenomenon. Speakers achieve cohesion in speech by alternating between full lexical forms, pronouns, and zero anaphora as they track referents. They also track referents in co-speech gestures. In this study, we explored how viewpoint is deployed in reference tracking, focusing on representations of animate entities in German narrative discourse. We found that gestural viewpoint systematically varies depending on discourse context. Speakers predominantly use character viewpoint in maintained contexts and observer viewpoint in reintroduced contexts. Thus, gestural viewpoint seems to function as a cohesive device in narrative discourse. The findings expand on and provide further evidence for the coordination between speech and gesture on the discourse level that is crucial to understanding the tight link between the two modalities.
Gentner, D., Ozyurek, A., Gurcanli, O., & Goldin-Meadow, S. (2013). Spatial language facilitates spatial cognition: Evidence from children who lack language input. Cognition, 127, 318-330. doi:10.1016/j.cognition.2013.01.003.
AbstractDoes spatial language influence how people think about space? To address this question, we observed children who did not know a conventional language, and tested their performance on nonlinguistic spatial tasks. We studied deaf children living in Istanbul whose hearing losses prevented them from acquiring speech and whose hearing parents had not exposed them to sign. Lacking a conventional language, the children used gestures, called homesigns, to communicate. In Study 1, we asked whether homesigners used gesture to convey spatial relations, and found that they did not. In Study 2, we tested a new group of homesigners on a Spatial Mapping Task, and found that they performed significantly worse than hearing Turkish children who were matched to the deaf children on another cognitive task. The absence of spatial language thus went hand-in-hand with poor performance on the nonlinguistic spatial task, pointing to the importance of spatial language in thinking about space.
Holler, J., Schubotz, L., Kelly, S., Schuetze, M., Hagoort, P., & Ozyurek, A. (2013). Here's not looking at you, kid! Unaddressed recipients benefit from co-speech gestures when speech processing suffers. In M. Knauff, M. Pauen, I. Sebanz, & I. Wachsmuth (
Eds.), Proceedings of the 35th Annual Meeting of the Cognitive Science Society (CogSci 2013) (pp. 2560-2565). Austin, TX: Cognitive Science Society. Retrieved from http://mindmodeling.org/cogsci2013/papers/0463/index.html.
AbstractIn human face-to-face communication, language comprehension is a multi-modal, situated activity. However, little is known about how we combine information from these different modalities, and how perceived communicative intentions, often signaled through visual signals, such as eye gaze, may influence this processing. We address this question by simulating a triadic communication context in which a speaker alternated her gaze between two different recipients. Participants thus viewed speech-only or speech+gesture object-related utterances when being addressed (direct gaze) or unaddressed (averted gaze). Two object images followed each message and participants’ task was to choose the object that matched the message. Unaddressed recipients responded significantly slower than addressees for speech-only utterances. However, perceiving the same speech accompanied by gestures sped them up to a level identical to that of addressees. That is, when speech processing suffers due to not being addressed, gesture processing remains intact and enhances the comprehension of a speaker’s message
Ortega, G., & Ozyurek, A. (2013). Gesture-sign interface in hearing non-signers' first exposure to sign. In Proceedings of the Tilburg Gesture Research Meeting [TiGeR 2013].
AbstractNatural sign languages and gestures are complex communicative systems that allow the incorporation of features of a referent into their structure. They differ, however, in that signs are more conventionalised because they consist of meaningless phonological parameters. There is some evidence that despite non-signers finding iconic signs more memorable they can have more difficulty at articulating their exact phonological components. In the present study, hearing non-signers took part in a sign repetition task in which they had to imitate as accurately as possible a set of iconic and arbitrary signs. Their renditions showed that iconic signs were articulated significantly less accurately than arbitrary signs. Participants were recalled six months later to take part in a sign generation task. In this task, participants were shown the English translation of the iconic signs they imitated six months prior. For each word, participants were asked to generate a sign (i.e., an iconic gesture). The handshapes produced in the sign repetition and sign generation tasks were compared to detect instances in which both renditions presented the same configuration. There was a significant correlation between articulation accuracy in the sign repetition task and handshape overlap. These results suggest some form of gestural interference in the production of iconic signs by hearing non-signers. We also suggest that in some instances non-signers may deploy their own conventionalised gesture when producing some iconic signs. These findings are interpreted as evidence that non-signers process iconic signs as gestures and that in production, only when sign and gesture have overlapping features will they be capable of producing the phonological components of signs accurately.
Peeters, D., Chu, M., Holler, J., Ozyurek, A., & Hagoort, P. (2013). Getting to the point: The influence of communicative intent on the kinematics of pointing gestures. In M. Knauff, M. Pauen, N. Sebanz, & I. Wachsmuth (
Eds.), Proceedings of the 35th Annual Meeting of the Cognitive Science Society (CogSci 2013) (pp. 1127-1132). Austin, TX: Cognitive Science Society.
AbstractIn everyday communication, people not only use speech but also hand gestures to convey information. One intriguing question in gesture research has been why gestures take the specific form they do. Previous research has identified the speaker-gesturer’s communicative intent as one factor shaping the form of iconic gestures. Here we investigate whether communicative intent also shapes the form of pointing gestures. In an experimental setting, twenty-four participants produced pointing gestures identifying a referent for an addressee. The communicative intent of the speakergesturer was manipulated by varying the informativeness of the pointing gesture. A second independent variable was the presence or absence of concurrent speech. As a function of their communicative intent and irrespective of the presence of speech, participants varied the durations of the stroke and the post-stroke hold-phase of their gesture. These findings add to our understanding of how the communicative context influences the form that a gesture takes.
Demir, Ö. E., So, W.-C., Ozyurek, A., & Goldin-Meadow, S. (2012). Turkish- and English-speaking children display sensitivity to perceptual context in referring expressions they produce in speech and gesture. Language and Cognitive Processes, 27, 844 -867. doi:10.1080/01690965.2011.589273.
AbstractSpeakers choose a particular expression based on many factors, including availability of the referent in the perceptual context. We examined whether, when expressing referents, monolingual English- and Turkish-speaking children: (1) are sensitive to perceptual context, (2) express this sensitivity in language-specific ways, and (3) use co-speech gestures to specify referents that are underspecified. We also explored the mechanisms underlying children's sensitivity to perceptual context. Children described short vignettes to an experimenter under two conditions: The characters in the vignettes were present in the perceptual context (perceptual context); the characters were absent (no perceptual context). Children routinely used nouns in the no perceptual context condition, but shifted to pronouns (English-speaking children) or omitted arguments (Turkish-speaking children) in the perceptual context condition. Turkish-speaking children used underspecified referents more frequently than English-speaking children in the perceptual context condition; however, they compensated for the difference by using gesture to specify the forms. Gesture thus gives children learning structurally different languages a way to achieve comparable levels of specification while at the same time adhering to the referential expressions dictated by their language.
Holler, J., Kelly, S., Hagoort, P., & Ozyurek, A. (2012). When gestures catch the eye: The influence of gaze direction on co-speech gesture comprehension in triadic communication. In N. Miyake, D. Peebles, & R. P. Cooper (
Eds.), Proceedings of the 34th Annual Meeting of the Cognitive Science Society (CogSci 2012) (pp. 467-472). Austin, TX: Cognitive Society. Retrieved from http://mindmodeling.org/cogsci2012/papers/0092/index.html.
AbstractCo-speech gestures are an integral part of human face-to-face communication, but little is known about how pragmatic factors influence our comprehension of those gestures. The present study investigates how different types of recipients process iconic gestures in a triadic communicative situation. Participants (N = 32) took on the role of one of two recipients in a triad and were presented with 160 video clips of an actor speaking, or speaking and gesturing. Crucially, the actor’s eye gaze was manipulated in that she alternated her gaze between the two recipients. Participants thus perceived some messages in the role of addressed recipient and some in the role of unaddressed recipient. In these roles, participants were asked to make judgements concerning the speaker’s messages. Their reaction times showed that unaddressed recipients did comprehend speaker’s gestures differently to addressees. The findings are discussed with respect to automatic and controlled processes involved in gesture comprehension.
Kelly, S., Healey, M., Ozyurek, A., & Holler, J. (2012). The communicative influence of gesture and action during speech comprehension: Gestures have the upper hand [Abstract]. Abstracts of the Acoustics 2012 Hong Kong conference published in The Journal of the Acoustical Society of America, 131, 3311. doi:10.1121/1.4708385.
AbstractHand gestures combine with speech to form a single integrated system of meaning during language comprehension (Kelly et al., 2010). However, it is unknown whether gesture is uniquely integrated with speech or is processed like any other manual action. Thirty-one participants watched videos presenting speech with gestures or manual actions on objects. The relationship between the speech and gesture/action was either complementary (e.g., “He found the answer,” while producing a calculating gesture vs. actually using a calculator) or incongruent (e.g., the same sentence paired with the incongruent gesture/action of stirring with a spoon). Participants watched the video (prime) and then responded to a written word (target) that was or was not spoken in the video prime (e.g., “found” or “cut”). ERPs were taken to the primes (time-locked to the spoken verb, e.g., “found”) and the written targets. For primes, there was a larger frontal N400 (semantic processing) to incongruent vs. congruent items for the gesture, but not action, condition. For targets, the P2 (phonemic processing) was smaller for target words following congruent vs. incongruent gesture, but not action, primes. These findings suggest that hand gestures are integrated with speech in a privileged fashion compared to manual actions on objects.
Sumer, B., Zwitserlood, I., Perniss, P. M., & Ozyurek, A. (2012). Development of locative expressions by Turkish deaf and hearing children: Are there modality effects? In A. K. Biller, E. Y. Chung, & A. E. Kimball (
Eds.), Proceedings of the 36th Annual Boston University Conference on Language Development (BUCLD 36) (pp. 568-580). Boston: Cascadilla Press.
Zwitserlood, I., Perniss, P. M., & Ozyurek, A. (2012). An empirical investigation of expression of multiple entities in Turkish Sign Language (TİD): Considering the effects of modality. Lingua, 122, 1636 -1667. doi:10.1016/j.lingua.2012.08.010.
AbstractThis paper explores the expression of multiple entities in Turkish Sign Language (Türk İşaret Dili; TİD), a less well-studied sign language. It aims to provide a comprehensive description of the ways and frequencies in which entity plurality in this language is expressed, both within and outside the noun phrase. We used a corpus that includes both elicited and spontaneous data from native signers. The results reveal that most of the expressions of multiple entities in TİD are iconic, spatial strategies (i.e. localization and spatial plural predicate inflection) none of which, we argue, should be considered as genuine plural marking devices with the main aim of expressing plurality. Instead, the observed devices for localization and predicate inflection allow for a plural interpretation when multiple locations in space are used. Our data do not provide evidence that TİD employs (productive) morphological plural marking (i.e. reduplication) on nouns, in contrast to some other sign languages and many spoken languages. We relate our findings to expression of multiple entities in other signed languages and in spoken languages and discuss these findings in terms of modality effects on expression of multiple entities in human language.